Mass-Energy Equivalence
Physics ⇒ Modern Physics
Mass-Energy Equivalence starts at 11 and continues till grade 12.
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See sample questions for grade 12
A nuclear reaction converts 0.002 kg of mass into energy. Calculate the energy released. (c = 3.0 × 108 m/s)
A photon has an energy of 3.0 × 10-13 J. What is its equivalent mass? (c = 3.0 × 108 m/s)
A positron and an electron annihilate each other. If each has a mass of 9.11 × 10-31 kg, what is the total energy released? (c = 3.0 × 108 m/s)
A radioactive decay process releases 2.5 × 1013 J of energy. What is the corresponding mass loss? (c = 3.0 × 108 m/s)
A system absorbs 1.0 × 106 J of energy. By how much does its mass increase? (c = 3.0 × 108 m/s)
Describe how mass-energy equivalence is demonstrated in particle accelerators.
Describe one real-world application of mass-energy equivalence.
Explain the significance of the speed of light squared (c2) in the mass-energy equivalence equation.
Explain why the energy released in chemical reactions is much less than in nuclear reactions, in terms of mass-energy equivalence.
Explain why the mass of a hot object is slightly greater than when it is cold, according to mass-energy equivalence.
Explain why the mass of a nucleus is less than the sum of the masses of its individual nucleons.
If 1 kg of mass is completely converted into energy, how much energy is released? (Take c = 3.0 × 108 m/s)
If a system loses 5 × 1012 J of energy, by how much does its mass decrease? (c = 3.0 × 108 m/s)
In the equation E = mc2, what does 'c' represent?
State the mass-energy equivalence formula.
Who first proposed the mass-energy equivalence principle?
